JPEG is the most widely used photo format, however it has one major weakness: it does not allow alpha channel. Whenever you need a graphic to appear on a patterned canvas without white borders, you require PNG format.
Converting JPG to PNG is a simple operation, and knowing if it is the correct option will save effort and prevent unneeded file bloat.
The primary motivation to change JPG to PNG is to gain access to PNG's alpha channel. Very important for watermarks and interface elements which must blend seamlessly over various backgrounds.
Something important check here to understand: changing a JPG to PNG will not automatically make the alpha channel. You must still to delete the background using editing software like Photoshop or GIMP.
Be careful about when converting JPG to PNG is that PNG images are typically heavier than their JPG equivalents. This is because PNG applies lossless compression storing more image data.
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